This high input impedance circuit was found in American documentation from the 1980s. The power supply must be symmetrical. The circuit applies to modern operational.
May 2017 - Mouser Electronics announces the availability of new Toshiba SSM6K N Channel MOSFETs...
Using integrated circuits from the time, we found this audio compressor in an English publication from...
The 2009 project is based on the integrated circuit9 LM317T, an adjustable regulator with 3...